Steam-boiler gage.



J. A. MOORE.

STEAM BOILER GAGE.

APPLICATION FILED MAYG, 1911.

1,012,41 1. Patented Dec. 19,1911

JOHN A. MOORE, OF WINSTON SALEM, NOB-TH CAROLINA.

STEAM-BOILER GAGE.

Specification of Letters Patent.

Patented Dec. 19, 1911.

Application filed May 6, 1911. Serial No. 625,44

To all whom it may concern:

Be it known that ,1, JOHN A. Moons, a citizen of the United States,residing at Winston Salem, in the count of ,Forsyth and Stateof'North'Carolina, ave invented new and useful Im rovements in Steam- 1Boiler Gages, of which the following is a specification. i

This invention relates to gages or water 19 indicators for-steamboilers, and the princievice of simple and improved construction bymeans of which the state of the water in the boiler may be accuratelyobserved at any time, visually and without necessity for operating theage cocks.

A further oiject of the invention is to produce a gage or indicator inthe construction of which the use of glass or frangible material shallbe avoided.

A still further object ofthe inventionis to produce-a gage or indicatorof the class described in which a pointer movable over a graduated scaleis actuated by a float, thus 2 enabling the true state of the waterlevel to be accurately ascertained at any time.

With these and other ends in view which willreadily appear as the natureof the invention is better understood, the same con- 3 sists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanyin illustrated a sim le an preferred form of theinvention, it ing, however, understood that no limitation is necessarilymade to the recise structural details therein exhibited, ut thatchanges, alterations and modifications within the'scope of theclaims maybe iresorted1towhen desired.

1 In-ithe' drawing -Figure 1 is a partly sec-.

011,31, front view showing the dev ce a lied t on for operation. ig. 2

sectional view taken on the dflil'iliefvrtakn on the line 3-3 inFig; 2.:Gm pb bye characters of reference,

lnfca -out this, invention a metallic ,gr cy er 1- is connected with aboiler 1n=tlien1anner of an ordinary gage glass, oneiend of saidtubebeing connected-wit the aceandtheother end withthe water 15 5 tubeor c linder 2, 3 an 4 disal object of the invention is to provideadrawing has been I arts in the several figures posed, respectively,adjacent to the upper and lower ends and intermediate the ends, asshown. By means of these gage cocks the state of'the water in the boilermay be tested in the usual well known manner.

.Associated with the cylinder 1 by means of tubular connections 5 and 6near the upper and lower ends, respectively, is a second tube orcylinder 7. The tubular connections 5-and 6 are provided with valves 8and 9 whereby they maybe obstructed when desired. When the valves 8 and9 are opened it is obvious that water or steam and water, as the casemay be, will pass from the tube or cylinder 1 to the tube or cylinder 7,in which latter the water will rise to the same level as in the tube 1and in the boiler. The lower end of the cylinder 7 has a pet cock ortry-cock 10.

The upper end of the cvlinder 7 has a head 11 equip ed with a gland orpacking box 12 throu which extends a rod 13, the lower end of which isattached to a float 14 within the cylinder. The parts are obviously tobe so fitted together'that the rod .13 will move freely through thegland, the weight of the floatbein sulficient to move the roddownwardly, while the buoyancy of said float must be suflicient toenable the rod to rise freely when water enters the tube or cylinder 7.The rod 13 is provided at its upper end with a lateral extension 15having a downwardly extending arm 16 carrying a pointer 17 whichcoiiperetes with a scale 18 marked upon the surface of the tube orcylinder 1. The surface of the latter tube or cylinder is preferablycoated or plated with bright metal, such as nickel, German silver oraluminum, material being preferabl used which is not likely to corrode,but which willreadily retain its Ibrightness, thus enabling the scale tobe easily read and the position of the pointer 17 to be very read1lascertained at any time even from some tance.

a In the operation of this device, the pointer in connection with thegraduated scale will at 'alltimes'--correctly indicate the state of thewaterin the boiler. When the water is low and the injector is put towork, the water as it rises will cuts the tubes orcylinders 1 and 7,causing e float 14 to rise in the latter. As the water gradually becomeslowered in the boiler, it is obvious that the pointer will indicate thatsuch is the case.

Any variation, caused .byyarying steam pressure, has been found to be soslight as to be negligible. r r

In boilers, and especially in boilers where the pressure is heavy, glassgages'iare undesirable for the reason that they are very likely to bebroken or blown out, thus necessitating repairs and temporarilyinterfering with the usefulness of the boiler. Another serious objectionis that the gage glass, it the water is at all muddy or.contains muchsediment, will soon become (:10 ged or obscured to such an extent as toma e it impossible to observe the state of the water level visually. Itthen becomes necessary to depend upon the gage cocks for ascertainipgthe state of the water or else to clean and brighten the gage glass, anoperation which necessitates its removal and consequent loss of time.These and other disadvantages are overcome by the present inventionwhich, as will be seen, is simple in construction, certain in itsoperation. and very easily applied to any boiler in place of the oldfashioned gage glass.

Having thus described the invention, what is claimed as new, is

1. In a boiler gage, a gage tube associated with the boiler and havinggage cocks and an indicating scale, an auxiliary tube, valved ductsconnecting the auxiliary tube with the upper and lower ends of the gagetube, a head at the upper end of the auxiliary tube having a gland, afloat within the auxiliary tube, a rod associated with the float andextending through the gland, said rod being provided' at its upper. endwith a lateral extension having a downwardly extending arm, and apointer carried by said arm.

2. In a boiler gage, a gage tube associated with the boiler and havmgage cocks, said tube having a coating 0 bright and non-corrodiblematerial and an indicating scale inscribed thereupon, an auxiliary tube,valved ducts connecting the upper and lower ends of the auxiliary tubewith the upper and lower ends of the gage tube, a head constituting aclosure for the upper end of the auxiliary tube and having a gland, afloat within the auxiliary tube, a rod associated with the float,extending upwardly through the gland and having at its u per end alateral extension provided wit a downwardly extending arm, and a pointercarried by said arm and cooperating with the scale inscribed upon thegage tube.

In testimony whereof I aflixmy signature in presence of two witnesses.

JOHN A. MOORE. lVitnesses:

W. E. FRANKLIN, J. PJHURDLE.

